The original Galaxy S smartphone, launched in June 2010, had sold some 24 million units as of January, with 10 million purchased during the first seven months of launch, Samsung said. The follow-up Galaxy S II, launched in April 2011, reached the 10 million sales mark in five months, and had logged sales of around 40 million units earlier this year.

The Galaxy S 4's predecessor, the Galaxy S III achieved 20 million global sales in 100 days, and also passed the 40 million unit sales mark as the beginning of the year.

Samsung unveiled the S 4 in March. The 5-inch Galaxy S4 includes 2GB of RAM and a 1.9-GHz quad-core processor. The GS4's 1,920-by-1,080 screen runs on an enhanced version of Google's Android 4.2.2 Jelly Bean. It comes in 16GB and 32GB, with expandable memory up to 64GB.

Chloe Albanesius has been with PCMag.com since April 2007, most recently as Executive Editor for News and Features. Prior to that, she worked for a year covering financial IT on Wall Street for Incisive Media. From 2002 to 2005, Chloe covered technology policy for The National Journal's Technology Daily in Washington, DC. She has held internships at NBC's Meet the Press, washingtonpost.com, the Tate Gallery press office in London, Roll Call, and Congressional Quarterly. She graduated with a bachelor's degree in journalism from American University...
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